This article refers to:
Adam Janiak, Mikhail Y. Kovalyov and Maciej Lichtenstein (2013) On a single machine-scheduling problem with separated position and resource effects Optimization http://dx.doi.org/10.1080/02331934.2013.804077
When the above article was first published online, it should have included an acknowledgement as follows: this research was supported by the Polish National Science Centre [decision no. DEC-2011/03/B/ST6/00364]. This has now been corrected.
The authors apologise for this error.